CVE-2026-23386

Local service interruption via QPL cleanup overrun

Published Mar 25, 2026 · Updated Mar 25, 2026

Out-of-bounds access in the Linux Kernel gve driver allows local users to interrupt service during DQ-QPL transmit cleanup. gve_tx_clean_pending_packets uses the RDA cleanup path in QPL mode, treating shared buffer IDs as DMA addresses and indexing beyond the dma array. Low-privilege local access and a gve interface operating in DQ-QPL mode are required; the reported consequence occurs during ring shutdown or reset.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds access in the Linux Kernel gve driver allows local users to interrupt service during DQ-QPL transmit cleanup. gve_tx_clean_pending_packets uses the RDA cleanup path in QPL mode, treating shared buffer IDs as DMA addresses and indexing beyond the dma array. Low-privilege local access and a gve interface operating in DQ-QPL mode are required; the reported consequence occurs during ring shutdown or reset.

The record

CVE
CVE-2026-23386
Published
Mar 25, 2026
Updated
Mar 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.6
  2. Affected versionversion=a6fb8d5a8b6925f1e635818d3dd2d89531d4a058 <07e0c80e17ef781799e7cd5c41a7bf44f1bf6a5f
  3. Affected versionversion=a6fb8d5a8b6925f1e635818d3dd2d89531d4a058 <3744ebd8ffaa542ae8110fb449adcac0202f4cc8
  4. Affected versionversion=a6fb8d5a8b6925f1e635818d3dd2d89531d4a058 <71511dae56a75ce161aa746741e5c498feaea393
  5. Affected versionversion=a6fb8d5a8b6925f1e635818d3dd2d89531d4a058 <c171f90f58974c784db25e0606051541cb71b7f0
  6. Affected versionversion=a6fb8d5a8b6925f1e635818d3dd2d89531d4a058 <fb868db5f4bccd7a78219313ab2917429f715cea

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.6; version=a6fb8d5a8b6925f1e635818d3dd2d89531d4a058 <07e0c80e17ef781799e7cd5c41a7bf44f1bf6a5f; version=a6fb8d5a8b6925f1e635818d3dd2d89531d4a058 <3744ebd8ffaa542ae8110fb449adcac0202f4cc8; version=a6fb8d5a8b6925f1e635818d3dd2d89531d4a058 <71511dae56a75ce161aa746741e5c498feaea393; version=a6fb8d5a8b6925f1e635818d3dd2d89531d4a058 <c171f90f58974c784db25e0606051541cb71b7f0; version=a6fb8d5a8b6925f1e635818d3dd2d89531d4a058 <fb868db5f4bccd7a78219313ab2917429f715cea

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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